Fire extinguisher



Nov. 19, 1928. y. GILBERT I 3 FIRE EXTINGUISHER Filed Sept. 21, 1925 Fi .1. V y F 3 INVENTOR ATTORNEY Patented Nov. 19, 1929 t VICTOR GEORGE WILLIAM GILBERT, OF LONDON, ENGLAND, ASSIGNOR', BY MESNE AS- SIGNMENTS, TO AMERICAN LA FRANCE AND FOAIVIITECORPORATION, A COR PORA TION OF NEW YORK FIRE EXTINGUISHER Application filed September 21, 1925, Serial No. 57,537, and in Great Britain December 10, 1924.

The object of this invention is to improve the action of extinguishers of the kind in which two solutions are separately contained and brought into mixing contact on inversion for producing a fire-extinguishing medium particularly foam-type extinguishers in which such medium is foam. The object is to avoid the initial discharge, immediately on inversion of one of the solutions unmixed with the other, by means of a simple and inexpensive construction.

In the accompanying drawing, Figure 1 represents an axial section of a standard form of extinguisher to which the invention has been applied and Figure 2a larger scale section thereof.

The extinguisher comprises a main or outer container l provided with a ring-form neck member or" casting 2 threaded to receive the usual screw cover 3 and also an inner container 4 which isseated at its lower end on the bottom of the outer container and provided at its upper end with a cage structure 5 which normally occupies, and is supported I by, the opening in the neck casting, through which opening the inner container is intended to be removable as will be understood. The

i I inner container is normally closed by a stopple 6 which may be gravity operated or exteriorly operated, as desired. It will be understood that an acid solution is usually contained in the inner container and a basic solution in the outer container. j

The discharge outlet from the extinguisher is constituted by-an elbow 7 and hose con- "nection 8 of usual type, and the elbow is threaded into an opening 9 formed inthe ring casting 2. This opening or passage 9 constitutes the entrance to the discharge outlet and is extended inwardly so that its orifice first come into contact when the extinguisher is inverted. Preferably such orifice is in line with the inner surface of the neck casting, and it is faced either directly toward the cage of the inner containeror upwardly, i. e., to-

' such orifice consists, of a mixture of the two solutions, resulting in the delivery of foam from the start, instead of an initial slug of liquid or watery foam as commonly the case in extinguishers of this class. The duration of thefoam stream is also increased. By locating the entrance section of the deliverypassage in the neck casting, the correct position of the entrance orifice is easily and simply obtained without special manufacturing operations and thereby an improved extinguisher isproducedat extremely low cost.

Claim:

In an invertible foam extinguisher, an

outer container adapted to hold one .of the vfoam forming solutions and having a cast in by said cover, said cast-metal neck-memher being formed with a seat forsaid cover and witha'lateral projection below said seat, said projection being hollow from a point-substantially in line with the side of said neck outer container, and having a foam-delivery I member securedto its outer end.

In testimony whereof I have hereunto aflixed my signature. is close to the point where the two solutions V VlCTOR GEORCE WZLLIAM GILBERT. 

